A heavy bbl 10/17 would be fun, and I'm EXTREMELY partial to leverguns, but I won't suggest you buy the Berreta Storm...it's a great gun, in the hands of professional shooters, anyone who buy's G&A magazine has seen it throw impressive 50yrd groups-you'll likely never shoot it that well. I had the chance to "test run" one recently, it was pretty impressive in the accuracy department, however, for what it is, it's huge and ungainly...kinda like having a full sized six shot revolver chambered in .22lr, there's just no need to be that big for what it is. As far as pistol cartridge semiauto carbines go, I've had two Kel-tec Sub-2000's, one in 9mm and one in the .40S&W, two hi points in 9mm, an Israeli semiauto "tommy gun" repro in .45acp, and handled the CX4 for about a month...overall it was a good gun, but it cost $600, I could buy three hi-points, or two Kel-tecs for that price, and they shot every bit as good, maybe the quality of the Hi point wasn't as good, and the kel-tec was pretty small for good shooting (it's made to fold in half and be small for easy storage), shooting them in the same manner gave pretty well the same results. The Israeli tommy was $400 freshly imported-don't see many come around like it anymore, but it by far out performed the CX4 on accuracy, and power (9mm vs. .45acp).

I won't say don't buy it, I'm just saying look at the "cheaper" models out there first, they're every bit as good and cost WAY less (although the Berreta is VERY upgradable, while the others really aren't).

Now, my suggestion for a fun gun is definitely a levergun, if you're looking for one just for fun, maybe some short range deer hunting, a Marlin 1894 .44mag would be great, I've got a pair of them and they're as reliable as anything, and pretty accurate to boot, I've used one of them for deer out to just under 200yrds. It's also hard to beat the Marlin 1895's, depending on your taste you can get a LONG one, or a SHORT one, the 1895 cowboy or a 1895 Guide gun respectively. I've got both, they're both incredibly accurate and have a ton of power if you want it, if you're just looking for a plinker, shooting factory ammo through them is rather mild. I've got a buddy that has a marlin 336 .30-30 that throws 2.3" groups at 200yrds all day, and he's a terrible shot usually. (If you do get the Marlin, post it here and I'll email you a preventative "fix" for it, nothing to worry about really, just a small production flaw that MIGHT cause a problem 1000rnds down the road called the Marlin Jam-one time occurence thing that requires the gun be disassembled to clear.)

If you decide to go with a levergun, if you want a pistol caliber, DO NOT get the Winchester 94, you WILL be sorry if you do...if you're getting a .30-30, I still don't recommend the winchester, but I won't say don't buy it (win. 94 pistol calibers don't feed for crap and they tend to be terrible on accuracy-I don't like the 94 action is why I never recommend it, but it's designed for the .30-30 and the .32-30, long bottle neck, rimmed cartridges, and they haven't figured out in over a hundred years how to get it to work right with pistol cartridges.)

You might also look into a AR-15 or a SKS or AK-47, not many things more fun than just burning up ammo in a hurry. A Yugoslavian SKS can be had for $150, better quality ones for $300 or less, AK's are $200-600, AR's typically start at $600 new and can run clear up to $10K. The 7.62x39mm SKS and AK can be hunted on deer, and all three make pretty good varminters, with the AR-15 being the best by a long shot.