The ISPT is definitely worth a look if you can bink a seat cheaply in the online satellites. Should be worth it for the experience.
Don`t be too optimistic of a big score, though. The field will be very tough. It`s going to be THE big tournament in the UK this summer. Every live tournament player I know has it on his radar, and I hear that some UK pros who would usually be in Vegas for the WSOP
at that time of year are staying in London instead.