Need advice on whether it's still worth fixing or junking this car.  (I don't wish to pass on a head-ache to someone else.)  I still love this car for the solid feel and the good overall condition.

Some history:

Bought the car in 1999 and then the engine blew up in 2000 - piston rod went thru bottom of engine, oil drained and hard-stop :-(  After much aggravation, the used car dealer rebuilt the engine in late-2001.  The engine was fine until the blow-up.  After the rebuild, the engine behaved almost normal for about 4 months (but past 3 month waranty), and since then it's not. The symptoms are:

- Car shakes at idle and more shake when in drive (standing still).  The shake is like a rocking of the entire car; overall, less felt-power (sluggish) than before.  Lots of tapping noise from engine.

- Shifts from 1st to 2nd is delayed and then thumps into 2nd.  The time it takes to shift is also unpredictable

- smokes much at idle and then more smoke while accelerating from stand still

btw. from google search, found many owners of this year model have very similar problems

Please advice