Hello ibud, I can honestly say that of all the airguns I have owned, I feel the TF-89 is a steal for the money. I have now tuned 2 of them, and they can be very impressive. I have chronographed my personal 89 with these results.
RWS super H-points- 760-780's
Benji Discovery domed H-points 809 ( impressive for a 14.3 gr. pellet)
Beeman crow mags- 750-760 fps (these pellets shoot faster for their weight than any other comparable pellet I have used)
Polymag Predators- 740-750 16 gr. pellet
Just yesterday, I was shooting drinking water bottles at 60 yards with open sights very consistently with complete penetration using the Ben. Disco. pellets.
If I can help with any other questions, feel free to ask. I do have a Chrony Alpha, and will be willing to test my guns with any pellets you guys would like to see perform. The trigger on the TF-89 is nice with no modifications other than adjusting the stages and spring tension. Hopefully I have helped push you towards the Contender 89, as I feel you will not be disappointed. I have a dealer account with Compasseco, and for the cost they are the best thing out for a hard hitting hunter!
Take care,
Mike