Laurie, welcome. The choice between using bipolar or mosfet output transistors is relevant to the engineers designing receivers, but should be a non-issue to the user. Units in all price ranges use either type with essentially equal end results. Tubes represent an obsolescent technology and aren't competitive on a price/quality scale.
As far as the receivers that you're considering, any would serve you well. Since you apparently would like something specific, I'll suggest the Yamaha 2600(or the new 2700)as being possibly a bit more user-friendly(at least the manual is).
