If you were happy with the performance of your CQ71, either of your choices will be fast enough. Laptops have improved a lot since you purchased your Compaq. You may miss the larger 17" screen, but you can always connect an external monitor when you aren't on the road.
Thanks for the replies...and as for the £1k laptop..I have never spent more than £600 on a laptop in over 20 years of business. You only need to spend that sort money if your development really need it !
The CQ71 was getting a bit old in the tooth and I wont miss the 17" screen..
Your CQ71 has something which today's cheap laptops don't - above-average resolution of 1440x900. For development, I would get a laptop with 1080p screen (and you should be able to find one for below a grand,whether it's UK or USD).