You cant go wrong with the Avondale audio NCC 200 power amplifiers they a relatively easy build and superb sound
Les Wolstenholm also has a new amp the NCC 220 and is finalising the NCC- 300 amp so visit his web
site http://avondaleaudio.com/
Where you can buy built up boards and block build an amplifier or call Les up as he sometimes sells bare circuit boards so you can build an amp from Scratch
I use these amplifiers my self and they are excellent IMO
Here is a monoblock Voyager amplifier I built with NCC 200 amplifier boards on the right next to left a Stereo Hackernap amplifier which was a group design and buy from the DIY part of Pinkfishmedia again the hackernap is based on the old RCA class A/B design that NAIM modified and exploited to very well over the years.
wish you all the best of luck with your first build its very interesting and rewarding when they dont blow up
IMG_2232 by Alan Towell, on Flickr
Alan
Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, Micro Sieki MA505 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Avondale NCC300 Mono Block, Speakers Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500