Laptop for up to 15-tabling without lag

Any advice appreciated, thanks

Is this laptop below more than good enough for the job please?

I currently have an Acer Aspire 8930G which is great for everything except playing more than 6/7 tables on Sky Poker. After that I get extreme lag and it's unplayable (with no other programs running). This is just on the browser - the download client is unplayable with just 2 tables. Everything is so slow lol

I'm presuming it's my laptop that can't handle the flash-based software - it's got 4GB RAM but only 32bit (hence only reads 3). The CPU useage flickers between 95-100% continuously when playing 6 tables. I have fast BT Infinity B/B so can't be that causing the lag.

Am after one that will be good for a few years, without spending more that about £700ish which this comes in at approx. Will this be ok? Is there anything on the spec that's not quite up to the job?

New! Dell Inspiron 17R
3rd Generation Intel® Core™ i7-3517U processor (4M Cache, up to 3.00 GHz
Windows 8 64bit, English
17.3in FHD (1920 x 1080) Backlit Display with Anti Glare
8GB² DDR3 SDRAM at 1600MHz
1TB 5400 RPM Hard Drive
AMD Radeon™ HD 8730M 2G DDR3
8x DVD+/-RW Optical Drive
Intel® Centrino® Wireless-N 2230 Card, 802.11b/g/n + BT4.0
Primary 6-cell 65 W/Hr
1 yr Next Day In-Home Service with Premium Phone Support
2.73 kg.