DD let me know if you want more detailed advice and I'll send you a PM.
Nessie - always believed in Guinness, especially over here in Ireland where it's a million times better than in the UK. The nearest pub to where I used to work was also the closest pub to Arthur's birthplace and many people thought served the best pint in Ireland....not sure I can confirm that (as there's still a couple I've not drank in), but it was very, very good.
Anyway, 5 hilly miles running solo around the local woods in the dark. Nice.
Just buy one and come back in a couple of weeks for advice on a much more expensive one if it's not what you need. It's so cheap that you'll loose nothing buying it (you'll always use it for something else).
I have the same issues as I can't take more than a couple of gels without feeling queasy and have experimented with all sorts of different things - jelly babies, marzipan & nut balls, home made chocolate & date bars (like Mule bars), raisin bakes and pretty much prefer anything to gels. I usually take a combination of all of the above and just enjoy choosing as I'm running. I'll have to try the GU gels.
I still haven't found anything that stops me hitting the wall at around mile 20.