Hi
@mark_htfc
At that kind of budget, a lot will come down to personal preference. Me personally I would go for 144Hz over 4K every day of the week regardless of whether it is 15.6" or 17.3". Bare in mind a gaming laptop with 144hz display and a decent graphics card will output in 4K (assuming you have a 4k screen) so you can get the best of both worlds in that respect.
£2k, £3k it's going to buy you a lot of laptop regardless of whether it is from us at Asus or any other vendor for that matter. I guess it does come down to what you want to use it for. By spending say £3k just to get an i9 is it worth it when you could spend say £2k to £2.5k, get yourself a really decent monitor with the change but the laptop is an i7.
Is a 1080 Needed ? Well if you are playing games like League of Legends, Counter Strike, Overwatch etc, then it's overkill. If you want to future proof and play the latest AAA games that are resource hungry on really high settings then a 1060 / 1070 / 1080 is an area to look at.
I can offer you a few to consider and research
Option 1
G703GI-E5005R @ £2,799.95
This is more of a full desktop replacement. It's bigger, bulkier and has a lot of power under the hood., If you want the performance in line with desktop but something you can take to LAN's etc or use with an external monitor, this is an all round power house
17.3" screen with 144Mhz and 3ms Display
GTX 1080, play almost anything upto the max
512GB PCI-E SSD (Fast Read / Write Speeds), Plenty of space if you want to put some games on there
1TB Seagate Firecuda drive. (A lot faster than your standard S-ATA HDD). Will load large games quickly. Plenty of space for big game install like BFV, Call of Duty 4 etc
i7 8750H (Unless you are doing work that require a LOT of cpu power, the latest i7 should be more than ample for what you need it for)
Comes with around £150.00 free accessories (Rugged Gaming Rucksack, Gaming Mouse, Gaming Headset)
Option 2
GM501GS EI004T @ £1,899.95
15.6" Screen with 144Hz 3ms display
Full fat GTX 1070 which should play the majority of games on the higest settings
512GB PCI-E SSD (Fast Read / Write Speeds), Plenty of space if you want to put some games on there
1TB Seagate Firecuda drive. (A lot faster than your standard S-ATA HDD). Will load large games quickly. Plenty of space for big game install like BFV, Call of Duty 4 etc
i7 8750H (Unless you are doing work that require a LOT of cpu power, the latest i7 should be more than ample for what you need it for)
Thin, Stylish and lightweight (Max 19.9mm and 2.45KG)