First off you need to visit the diet forum and make sure that your diet in in check, otherwise using any steroid is a waste of time and money as you will not keep the gains you make once off the cycle, and on cycle gains will be disappointing.

Second, for a first cycle you could go with Anavar only if you aren't looking for mass. You will get leaner and more cut with maybe another 5-7lbs of lean mass added (this assumes diet and cardio to get the best results). For 8 weeks I'd dose at 50mg/day. I would take Live 52, Milk Thistle, Liver Juice, or the AR-R liver support supplement the entire time you're on the cycle. To combat libido issues you can simply use Avena Sativa and Tribulus at 2-4 and 5-8gms a day respectively. PCT should be either Nolva at 20/20/20 or Clomid at 50/50/50 (mg/day for three weeks).