I would be looking at one of these.IMO These are overlooked but I have been impressed with all the ones I have installed.
Zapco
IForce 5100.7
Bridge channels 1/2 and 3/4 on the mids. Run 4/5 on the tweeters and bridge channels 6/7 on the sub.
2 x 175w, 2 x 35w and 600w x 1.
This would give plenty of power and the option to go 3-way front if progress to that.
The other options I could list but many will be out side of your budget. Like the JL HD900/5, Alpine PDX5.
Those 5 chnnel RF amps are another great option.IMO