I have a SRT-201 for sale here (shameless plug). But if I had to choose between xd-11 and SRT, I'd go with the XD-11.
I think the XE-7 was probably the most rugged Minolta (ignoring the XK which is very hard to find). I think the XD-11 is the most capable. It's biggest drawback is that the leather shrinks, which is totally cosmetic.
The XE-5 and XD-5 were somewhat less featured models, but still quite capable.