Originally posted by: sumyungai
What do you guys think of this one with 1000 fps?
http://store.airgunwarehouseinc.com/gam611009854.html
Edit. If I buy one, do I need to oil the barrel down every now and then or is it maintenance free?
Unless something has drastically changed in the last two years, GAMO is garbage. Try straightshooters.com for some info and a selection of quality air guns. Be prepared to spend at least $150 for a decent-quality spring-powered rifle. Beeman (rebranded HW, Theoben, Webly, and others), RWS/Diana/Dynamit-Nobel, and BSA are all popular brands among the mid-high end air guns. The HW linked by the above poster is a quality German-made piece- not high-end, but light-years ahead of the junk GAMO puts out. With quality-made air guns, you are paying for better fit and finish, trigger quality, and customer support/warranty- note that power is not a factor here, as anyone can make a cheap, high-powered POS.
And no, you never want to oil the barrel on a spring-powered air gun, unless it is to put on a light coat for long-term storage. You do not want to have any oil drip down into the chamber, as it could potentially cause disealing (combustion) unless the oil is specially designed for the compression chamber (high flash point). In general, barrel cleaning is not highly recommended for spring-powered rifles, as the rifling is particularly delicate compared to powder guns, and as such is easily damaged by standard metal cleaning rods. The lack of powder residue means that only a little bit of lead from the pellets will dirty the barrel; however, you might even find that a bit of lead in the barrel helps with precision, as the buildup pretty much plateaus after a certain amount.
Spring-powered air guns are almost maintenance-free. You may need to add a single drop of compression chamber oil to keep the seal lubricated once every 10K round or so. The spring itself should be good for many, many, many rounds/years, and they are replaceable (although usually not advised for the unexperienced due to the high compression force of the spring, and hence potential for injury/difficulty in getting the old spring out and new spring in).
Ultimately, you have to consider your price, purpose, and the space you have to shoot. For general plinking, a moderate-powered 500-700fps .177 cal (i.e. Beeman R7, or the HW30:
http://www.beeman.com/r7.htm) would be ideal. You do NOT need (or want) a 1200fps monster for shooting cans.