Hello, im confused about my laptop......i hv options fr studio 15 dat has a i7 820qm 8mb cache wid ATI Mobility Radeon™ HD 5470 - 1GB vs. studio 15 same processor wid 512MB ATI Mobility Radeon HD 4570 vs.studio xps 16 it has a Intel® Core™ i7-720QM Processor (1.6GHz,4 Cores/8 Threads,turbo up to 2.8GHz, 6MB Cache) and a ATI Mobility RADEON® HD 4670 - 1GB....help me wid dis plz...nw note dat xps hs a i7 wid 720 qm nd both the studios hv i7 wid 820 qm