I'm loving headphone amps at the moment. Tried a couple and my favourite two are the EHX
[url="http://www.ehx.com/products/headphone-amp"]http://www.ehx.com/p...s/headphone-amp[/url]
for stowing in my gig bag, but the best I've had is this monster:
[url="http://www.davehallamps.co.uk/page29.html"]http://www.davehalla....uk/page29.html[/url]
The Line in feature is really helpful for playing along to setlists for covers bands and it also covers all of my recording needs and does a lovely line in dirt too! Happy days.
If you really want a a speaker then there's a chap selling a Roland Cube on here...
http://basschat.co.uk/topic/186932-roland-bass-cube-30-fsft/page__fromsearch__1