So Rock music I'm guessing?
Then you'll want an electric guitar. Acoustic does work for rock, but it's not as often used.
I myself reccommend guitar packs for starters.
Theres the Behringer V-Tone package, which is the one I'm using, It actually does sound very nice, especially after a few tweaks to it. I picked it up for about 110$:
http://www.samedaymusic.com/product--BEHGPACK
This next one is the Silvertone SS11 package, a little more expensive (170$). I have not used this one. But it does have a few things the Behringer pack doesnt (Such as the Video) but you can check it out:
http://www.samedaymusic.com/product--SVTSS11PAK
This is the Silvertone Rockit package, (200$), This one does have a Double Cutaway guitar, Much like the Gibson SG.:
http://www.samedaymusic.com/product--SVTRK21PAK
This here is the Squier package: (200$)
http://www.samedaymusic.com/product--SQU0280800506
The other packs on the SameDayMusic Site:
http://samedaymusic.com/browse--Elec...ar-Packs--2646