Buy a 90 spec 16V. The 16V is an awesome drive.
Also, if you have the 90 spec you can do an easy upgrade to a 2.0 ABF (150 BHP ) from the MK3 as the electrics are similar.
90 spec's are identified by having the hazard switch on the steering column. Pre 90's have a switch on the dash.
As said, buy on body quality as most mechanicals are easily changed.
8v is 115 BHP
16v is 139 BHP