You're almost sure to get a bunch of different suggestions, and most (if not all) of those suggestions will do the job that you're asking about.
My advice (it's worth what you paid for it - nothing) is that you go swing several different machines at your local dealer, or borrow a friend's machine to try out. You might also see if there is a local club where you can get some hand's on experience with machines that fit your criteria. What works for one might not work for another. (The Etrac and CTX weren't my cup of tea, but many people swear by them and they're fine machines - they just aren't the right machines for me)
I believe Whites, Tesoro, Fisher, Teknetics and Garrett are all made in the USA (since that is important to you). They all make fine machines that will find the good stuff once you learn the machine.
My own experience (and bias) is as follows: (keeping in mind your stated criteria)
Whites
MX5 - It fits your criteria on all counts. It has a fast recovery (nice in iron laden sites) and goes deep. It's a chatty machine - some like that and some won't. It does great on coins, loves nickels and does a good job of finding the good stuff that is mixed in with trash. I love the MX5 - others do not. The MX5 is light and easy to swing all day.
M6 - I have not used the machine. It fits your criteria though. My understanding is that it is a fantastic coin machine.
Tesoro
Vaquero — I have not used the machine. I recently bought the Compadre though and absolutely love it so far. I don't have a lot of time on it though. My understanding is that the Vaquero is fast, deep and deadly. I believe it and a Vaquero will be the next machine that I purchase.
Just about all of the Tesoro machines fit your criteria — the Tejon is a bit north of your declared financial limit though. I'd also look at the Outlaw, but cannot offer my thoughts on that machine (haven't used it).
The Compadre is light and easy to swing all day. I believe that is the same with their other models.
Fisher
F5 — I haven't used this model, but believe it fits within your stated criteria. I did have the F4 and found it to be a very capable machine (it would certainly do the job you require).
F70 — I'm not sure if this model falls within your price level, but it should be close. Again, I haven't used this model so I can't really comment on it.
The F4 was a light, easy to swing machine.
Tecknetics
G2 — I don't know about the new version, but I loved the old version (wish I hadn't sold it). It was fast, loved nickels (good on other coins too) and fun. Maybe not quite as deep as some of the others that meet your criteria, but it'll still go deep enough to make you tired at the end of the day. Light and very easy to swing. I loved it.
T2 classic — It fits your criteria. I haven't used one. Lots of people do though and love them.
Omega 8000 — I think it is no longer made. I've never used one. My understanding is that they're great on coins.
Garrett
AT Pro — I'm not sure if it fits into your price point, but it meet all of your other criteria. I've never used one. Lots of people do though and many swear by them.
Warranty -
Whites has a two year warranty that is transferable. Great customer service — I believe theirs is probably the best in the market.
Tesoro — lifetime warranty for original purchaser. Hard to beat that.
Fisher/Teknetics — 5 year warranty. I am not sure if the warranty is transferable. My understanding is that their customer service is very good.
Garrett — I think it is two years. I don't know if it is transferable. My understanding is that their customer service is very good.
Do yourself a favor and budget for a pin-pointer too. It'll save you time and frustration.
