The Logic Off Topic list

hello

i am very new to mac world i used for years logic on atari and win
but have been thinking to move to mac in order to run the latest logic.

first of all .. is it worthed ?
Is it a huge improvement over 5.5 ?
is there any soundiver editing capability
for synths in the new logic ?

and also what is a usable HW platform to run the latest logic on ?
2g ram or 4 gb ? mac mini ? imac ? mac pro ?

i dont use many vst but i would hate to spend 2000 euros or more
and have a non working/slow system

tnx in advace for the tips

Andrea