In reply to Jasonic, Studoig, andy.smythe, strata.andrew:
My mate has a pair of SL Activs and he rates them pretty highly so I'll be mindful of that.
I've also heard of the classic Mantas but not Altberg before so thanks for that name.
I run the Meindl Kansas as my main pair of boots at the moment so more Meindl is fine.
Thanks for all your advice, looks like I just need to find somewhere I can try a good range of all these on, that'll be the tricky part. Some good pointers here though so that's ace.