My First Amp Advice

I am having trouble deciding on what amp I should get.
I've been playing for nearly a year on a classical guitar and finally,
last month I got a Squier 51. I love it.
At the moment I am playing on my brother's bass amp,
but he is not too happy about it. (typical teenage sibling relationship)
Ok, so what I have narrowed it down to is the Line 6 Spider III 15W,
plenty of effects and quite cheap.
And the Roland Cube 15x, not as many effects (what every teenage
boy likes) but considerably cheaper.
I'm thinking I'd like the Line 6 one more because
it would keep me occupied for longer.

Thanks for any advice :D