I have owned the 87 Cheetah for about a year and consider it to be one of the finest made and smoothest shooting .22 handguns on the market today. At between $750 and $800 out the door it is also one of priciest, but you get what you pay for. This is gun I will be proud to hand down to my kids. I also own a 92FS and the Cheetah is a quite different gun. The Cheetah is a blow back design and lacks the decocker found on the 92. The 8 round mag is a downside, but it is my understanding that the 87 target mags which have a ten round capacity also fit the 87 Cheetah. You may want to confirm that. I purchased the extended barrel and counterweight for the 87 from CDNN. The 5.9" extended barrel does increase accuracy.
I would suggest you visit the beretta forum www.berettaforum.net. You will find a great amount of information on the Cheetah and can solicit opinions from people who have forgotten more than I will ever know about Berettas. The Beretta forum is also one of the most collegial and civilized forums out there.
Bottom Line: If you are willing to spend the $ you won't be disappointed.