why dont you just get a 15in macbook pro with a decent videocard and office for mac?
This pretty decent thats why i picked it and i already get a diiscount by 100$ or something (i know not that much, but im not really working)
15-inch: 2.4 GHz:
2.4GHz quad-core
Intel Core i7
4GB 1333MHz
750GB 5400-rpm1
Intel HD Graphics 3000
AMD Radeon HD 6770M with 1GB GDDR5
Built-in battery (7 hours)2