That looks quite good. I haven't been to a Holiday Inn wedding but I know hotels are pretty good at doing events these days and I'm sure they know exactly how to make your day feel special.
I expect they will have lots of extra things they can add on to bump that price up though so be careful - see it says "click here for a quote". It doesn't include things like a DJ or other entertainment in the evening for example, and you will have to add your own floral decorations, anything you want on the tables - favours and so on.
I like the idea of a sandwich lunch then a hot dinner, which is the other way around to what usually happens (nothing wrong with that, but beware your evening-only guests might just be expecting sarnies and could have had a big lunch already).
Also worth thinking about is whether yours would be the only wedding that day (and if you're bothered about that). I found the idea of bumping into another bride a bit strange, but loads of brides couldn't care less or in fact think it's a nice thing.
And it's all very good having somewhere gorgeous to have your photos done by the river, but is there anywhere nice inside if it's not good weather? Where will your guests loiter between lunch and evening do?
Definitely worth considering but make sure you look at a few different venues before you decide which you want to go with. We had about 5 lined up but stopped at no.3 because we knew that was the one we wanted.
I'll shut up now because I'm on the verge of a brain-dump and I'm sure you've got it all in hand already!
xx Em