Which Macbook Pro to buy?

[Hbthyname]

I'm fed up with my trying to get Pro Tools 9 to work on my Laptop so i'm looking into getting a mac.

I have a Mackie Blackjack USB interface and i'll pick up another external that has firewire.

Would either of the base models of the MBP be enough?

13-inch: 2.3 GHz

* 2.3GHz dual-core
Intel Core i5
* 4GB 1333MHz
* 320GB 5400-rpm1
* Intel HD Graphics 3000
* Built-in battery (7 hours)2
* £999.00

13-inch: 2.7 GHz

* 2.7GHz dual-core
Intel Core i7
* 4GB 1333MHz
* 500GB 5400-rpm1
* Intel HD Graphics 3000
* Built-in battery (7 hours)2
* £1,299.00



Or will I need this one?

15-inch: 2.0 GHz

* 2.0GHz quad-core
Intel Core i7
* 4GB 1333MHz
* 500GB 5400-rpm1
* Intel HD Graphics 3000
* AMD Radeon HD 6490M with 256MB GDDR5
* Built-in battery (7 hours)2
* £1,549.00



I will be using it througout university and will probably be running up to 30 track projects with many plug ins.

If I bought a base model and just upgraded the ram would that be ok?


Thanks for any help!