Amp, On A Budget?

I like both of the Dayton amps mentioned above. New, nice sounding, very quit amps for peanuts. At the price, they are perfect amps to buy as a backup and to compare other amps to as you progress on your upgrade path. You might be surprised how an exceptional low priced amp used as a comparison standard can reveal the pros and cons of "real" upscale amps.
I have more experience with the DTA-100A, which is a "t-amp". It seems to have plenty of power with several speakers I have used it with, but never tried it with a demanding 4ohm load or one with low sensitivity.
The APA 150, which I have only recently aquired is rated at 75wpc @ 4ohm, so might be more suitable for your Statements. My guess is either would work well with speakers claimed an "easy load most amplifiers, even tube amplifiers capable of 4ohm loads".

Aragon 2002. Great sounding inexpensive amp.

Sumo Polaris, should find one for $250

Parasound

I have heard all of the amps mentioned and they are all very musical....but the only budget amp I have heard that does some of what the high end amps do both transistor/fet and modern tube amps is the last version of the Hafler amps....with Jfet driver stages. My favorite is the Hafler XL-280. It has 6 mosfets per channel and easily beats the 140 watt per channel spec. I have three to lend to future audio buddies and they have never let me down. They all test at over 180 watts per channel...but I am not pushing the high output but the transparent deep sound and these little guys will play bass and control speakers really well. I have hooked a 280 (blind test) up to several of my friends systems with hard to drive speakers..such as Infinity's or DQ10, etc, speakers and they are amazed..they own BAT, Threshold, Pass Labs etc. Just my 2 cents worth....Good Luck.....