Instant on. No need to lose Q's waiting 4 minutes to warm up
Quiet. Does not heat up your shack or drown you with fan noise.
Loafs along at 2KW.
Absolutely idiot proof. It has. Superior computers inside.
The. Only amp of the 3 designed in the 21st century.
I have owned Alphas. We still have Alphas and Acoms at the NX6T contest station but all new amps will be 2K-FA.
Neither Alpha or Acom were at this year's Visalia DX Convention but 2 vendors for 2K-FA. We're selling like hotcakes.
I had an Alpha 8410, but starting having major problems with it after 2 years. I sold it and have never been happier with my Acom 1000. If you want reviews on the Alpha 9500 go to the groups.yahoo board for the 9500. You will get your fair share of frustrations about that amplifier.
I would recommend if a tube type that whatever you choose the tube is really available and cost efficient. Buy the spares now. check that 3rd order IMD listing .
If a solid state consider ones that use higher voltages than 12 VDC .
Over the years I have owned all of the amps mentioned in the original post. Both Alpha 9500's had numerous trips back and forth between Maine and Colorado... color that expensive even with a 4 year warranty. The Acom 2K amp I also had the pleasure of owning two different occasionse. Once before the Alpha amps, when I decided I wanted a single tube 8877 that the 9500 would provide, and again immediately after the second Alpha 9500 died unexpectedly for the umpteenth time. The Acom amps both had NO problems over the approximately 6 years total I owned them.... Then , as part of evolution I guess, I decided I wanted an all- in- one, instant on, high power, 160 thru 6 meter amplifier instead of the separate HF and 6 meter amplifiers. I had NO actual failures with the time I had the SPE2K and it really was a giant slayer even on the demanding Low Bands plus the bookend band of 6 meters. The one (and only) complaint I had was the noisy power supply cooling fan that winds up immediately on CW keying and was a bit distracting. (with headphones on , all was ok.) I could have resolved the noise problem by moving the amp further away very easily and using the remote software to control it. I downsized my larger station last year and sold the SPE2K and quite honestly, now that I am building a new remote only 8 miles from this HOA, ordered the new SPE1.3Kfa to do the heavy lifting there at the remote. Single heavy duty PA element, no more combining multiple PA modules, lightweight, instant on and remoteable. and will put out full legal 1500 all day. To answer the original post at the top of the page, I would go for the SPE2K with no qualms or afterthought concerning its reliability. When I had the top 3 big amps they were all used in a Contesting and heavy DXing environment with yagi stacks 40-10.
Cost is also in line with my wallet .
They work with the flex or sdr world . Will auto go everywhere .
Since they have never broken I cannot comment on repair .