T2I to 5Dii upgrade dillema...

If you've got that Full Frame 'bug', chances are, it's not going to go away.

So you might as well make your move sooner than later.

But if your going to commit yourself to FF you might as well realize that

it's going to cost a lot in the long run.

Selling off your old lenses will be no great loss, but consider that you,

should step up, in the future, to some good 'L glass'.

Only then will you see a great difference in image quality, thereby

making the change to FF worthwhile.

Keep in mind that making this big step will not make you a better

photographer, although it can act as a great springboard to  further dedication

and the improvements which follow.

I might suggest you wait a little while, until the 6D is introduced, and the

price settles down to where the MKII is now.