Hi Pete, one of the nicest heads (if not the nicest) I ever had was the twin channel Aguilar AG500, truly warm, punchy and articulate. Why the fook I ever sold that I'll never know.
You could pick one up used in vgc for that sort of money.
I had an Ashdown ABM500 once and I loved the tone but it was getting on a bit and I was scared to use it without back up (which I didn't have at the time). I'd love a Klystron head - I'd just need someone to carry it for me.
I think an Ashdown would suit you mate.