I went DIY for my speakers, as well. I use:
1. Verhagen Ribbons, built from the plans in his books. They cut off a bit below 350Hz, but are flat above that. I've had them almost four years, and they continue to impress. They were the first "real" hi-fi gear I had. Total cost to build was around $300. If you're interested in ribbons, I cannot recommend them highly enough. They have a freaky ability to reproduce voices; I've accidentally left them on and come back thinking there were people in the house when it was just the radio. Creepy, but it's the closest to live I've heard.
2. Cloned ProAc 2.5 Response speakers. Great bass and great across the board. I used the optional notch filter and these are very well balanced and have a wonderful soundstage. Total cost was around $1,000 and they were relatively easy to build, but took a lot of time to get everything right.
3. Moth Audio Cicada singledrivers. Great imaging and an uncanny lifelike presence. The drivers are still available for $119 each over at Eddie Current, and I think they're a steal. Plans are there too, and I spend about $300 on them.
I'm not sure where I'll go next. I might try my hand at restoring a pair of Quad ESL-57s. I've always liked those, and an electrostat would make a nice addition to the collection.