I started with a Stratos, then a Stratos Plus, then a Stratos Extreme, then a Stratos Dual-Mono (my favorite), then the Stratos Monos and finally the Stratos Mono Extremes.
I really liked the sound that these produced. However, after a few years, I grew tired of the Odyssey "house" sound. Nothing wrong with it, all manufactures have a their own house sound, but I just needed a change.
If you really have a budget of $3500, you MUST try the Belles 350A Reference. Made in the USA and David (Belles) is a master designer. Belles is not very well known, but is a fantastic line of audio equipment. These have more power and deliver more current than the Odyssey amps.
You should be able to get a used 350A Reference V1 for under $1500. The V2, I've seen for around $2000 used, but I've owned both and have a couple of friends who moved up from the V1 to the V2 and wished they hadn't. I agree, the V1 is the better of the two versions.
Hope this helps and doesn't confuse the issue any.