Yea, ASUS and cheap, are not alike!, but an A7A266 could fill your needs, I have one at work and performs perfectly (but with t-bird 1.2B and DDR), I tryed with Win98SE and later keep it running WinXP PRO, no issues yet (2 moths only). Is fast and very reliable. Acording to ASUS it suport a 25% overclocking, but in my case its used to work, so no OC here.
You can save more by using some PC133 and let the DDRs for later, but acording to benchmarks, its a dog with SDR memories. Remember, can't mix memory types!
A7V266-E
Athlon 1.2b @ 1301 (9.5x137Mhz)
Titan D5T cooler and 4 case coolers (just in case!)
512Mb DDR RAM (unbranded, 2x256Mb sticks)
Promise RAID 0 on 2 IBM Desktars 15Gb
CL Anihilator II
CL Live! Platinium
Aopen Hq08 full tower case (300 What PS)
DVD and CDROM on normal IDE channels
Win XP Pro OEM