..... I'm looking for,gold,jewelry,coins large objects ect.
Something that searches deep, the deeper better......
And to these factors you would no doubt add locations as being "any and all" ( beach, turf, ghost towns, etc....) Right ? How about nuggets? Would you add that in as a possible venue ?
So to say you want a machine that finds all (gold, silver), and all size objects, at all varieties of places, is .... well, a bit like asking this: What's the best car to do everything ? You want one that can go 160 mph, yet pull out stumps, and be used to shuttle the kids to soccer practice, and haul rock & gravel from the quarry if needed, etc... Eh ?
And terms like "deep" are a bit of a given. I mean, doh, who DOESN'T want a machine that goes deep ?

But at what cost of complications and "gotchas" ? If you say your patience is endless, and you want depth "no matter what", then get yourself a minelab GPX 5000: Gauranteed you will have balls to the walls depth on everything. And gauranteed you won't miss a thing (tinsel thin chains, earing studs, etc....). And singular coins to nearly 2 ft. deep ! Who could ask for more eh ? Then you take that gpx5000 to the nearest inner city blighted park, or to a ghost town, and let us know how it does
If when you say "large objects", that becomes a sole focus (a serious hunt component, looking for caches), then get yourself a TM 808. But it can't be used for coin/relic/jewelry hunting though. But it's assume if you just intended to hunt for soda-can or larger objects.
If you're just talking regular coin/relic detecting, get yourself a Minelab Explorer II. You won't find that used though. The nearest modern equivalent is the CTX. But I prefer the exp. II. So that you can have an inline proble (also not currently available). But if you can find that combination on the used market, would be my choice. It's also a good beach wet-salt machine (as long as you don't dunk past knee deep at the coil).
If you're going to be spending a lot of time in ghost-townsy / ruins/ old-town demolition type stuff, then consider a silver sabre II (or its modern equivalent), or a Minelab 705 with a variety of coils. HF coils for iron-ridden sites (and now you can also double for nuggets, in a pinch !). MF for normal routine coin/park type stuff, and LF for places where you want to cherry pick for high conductors, and aren't as concerned about flitty low conductors (eg.: under bleachers, etc...). 705 not top-notch on wet salt beach though.