JSP/J2EE web hosting - who's good?

I'm a C#/.NET guy (for many years) now aggressively learning Java/J2EE in order to be able to work on better platforms...such as linux...but translate the skills I already have...Java is the closest thing.

I need a SERIOUSLY *GOOD* JSP hosting provider...price really isn't even an issue (but I won't go over $50/mo., which is more than enough for shared-hosting.)

I prefer the Resin web server and I really *REALLY* love Firebird. I can't seem to find a host w/ this combination but I'd be flexible on the web server...Tomcat would be fine, for example, if they offered Firebird 1.5.x+ w/ it. MySQL won't cut it...no way...no offense to you mysql zealots out there but Firebird is my database

Can anyone point me in the right direction?

Thanks!