A few more points:
1. 15w is all you wil need... honestly... Anyone else telling you need more doesn't understand tone very well... It's not how big it is, it's how you use it... It's really true. Think of it this way... the volume knob is a percentage gauge... it gauges the percent of use you're getting out of an amp... If you have a 15w practice amp you bought for 100 dollars... and you're running it at 10 on the volume knob... you're getting 100 dollars worth.... if you have a 100 watt amp that you bought for 1000 dollars... and you can't turn it up past 2... because all you do is play in your bedroom... then you're only getting 200 dollars worth of the amp.... think about it. No one needs a half stack... in all actuallity... unless you're Zakk Wylde himself. I will blow your eardrums out with my Mark IV Mesa... it' "50 Watts" with a single 12" Black Magic speaker... I drown out JCM's all the time with it...
2. See for yourself.... you're trying to get a Zakk Wylde BLS tone... Here's the rundown of his tone.... He runs Marshall JCM's (Tube amp...) so look for an amp with a tube amp model... He uses a lot of distortion with a lot of overdrive over the top... He uses a lot of wah also... these are some things that no matter what wattage you're pushing... with 200 dollars... you're not going to have enough cash to get a wah and an overdrive pedal...
3. See for yourself again!! Play the amps... make your own decision... The Spider II is a killer amp either way. But look at the Fender FM series amps...they're cheaper because they're not modeling amps... but you'll have plenty of cash left over to grab a DigiTech RP80... which is a nifty little multi effects processor. It's only about 70 bucks... or you can find'em cheap on ebay. They'll give you a wah... and all kinds of chorus, delay, and other modulations.... good stuff. To say that you're a beginner and shouldn't be overwhelmed is true... but either way, you're going to have to learn sometime.
Rock on.
