Hrm, it might be helpful to point out that there is a big difference in the use of a PI machine for general metal detecting as relates to a VLF machine.
dance71 : PI, Pulse Induction, detectors are no good for discrimination. They do not make good all around detectors because they will make you dig it all. If your fine with that then don't worry; You will find that silver coin at 6 inches~ plus every scrap of metal besides and chase those itty bitties for an hour only to find junk. There really is no such thing as discrimination with this type of detector though some can somewhat distinguish iron and you can tune out small targets to a degree with others. As Terry kinda pointed out~ beaches and fields (for relics) are about the only good areas outside of the gold fields for this type of detector.
High value low trash environments are where these detectors excel for depth and sensitivity.
VLF detectors are closer to the mark for what your asking~ however they are not all around detectors either. You have your gold, beach and land/water detectors. For what you seem to be looking for a good land/water detector would be best. You can use these for gold prospecting however don't expect the performance you get with a PI~ this is due to the different operating principle of a VLF and how it views and deals with mineralization as well as other things.
VLF's offer a lot of information that PI's just can not do. You want to dig everything~ ok I get that however you will most likely find out you don't have all day to dig everything, or you'll get frustrated/tired/ect..., and you'll start using the advantages of discrimination and VDI read outs to pick your way thru the trashy area you hope is a honey hole full of goodies.
There are no dumb questions

If your looking to get outta the gold fields you can trade out your 2200 and have more than enough for any mid to high end VLF in the market. Read around a bit and do some research on what kind of features you want. If you still want to dig everything then pick up a unit that has excellent All Metal mode with some sort of VDI and get to digging. Expect a learning curve~ a PI is very easy to use but a VLF takes hours to understand and tweek till you max your digs on the good stuff.
Luck to ya and keep swinging.