SRP -- Is Autoglym super resin polish
Firstly, if you're on a tight budget, we have the Poorboys World products. This would be a two-stage treatment (similar to your SRP & Vics combo now), consisting of Poorboys Black Hole, followed by Poorbots Nattys Wax Blue. Both these products are formulated specifically for dark coloured cars. The Black Hole product is a glaze, which will brighten up the paint and mask some of the swirls/light scratches. It's much easer to use then SRP and doesn't have any side-effects such as trim stain! The Nattys Wax Blue is, again, very very easy to use. It lasts a reasonable time too.
Black Hole is €16.95, the wax is €19.95
If you can stretch the budget a bit more, we have the Carnauba Werkstat products here and they are fantastic value for money. Again, it's a two stage protection system consisting of a 'Prime' basecoat, followed by as many layers of 'Jett' as you like. These products are really easy to use and last really, really well. You only need to apply the 'Prime' basecoat every 3-4 months and in the meantime, you can top up the layers of 'Jett' as much as you like. Jett is a carnauba spray which makes it really quick and easy to top up protection.
Carnauba Prime is €28.95 and Carnauba Jett is €22.95.
If you're looking for the best possible products for your car, the Swissvax range is the answer. They do cost more than the others but they do leave the best possible finish. The best option would be to take a look at the Swissvax Onyx Discovery Kit. You get everything you need to try out most of the Swissvax range, including all the applicators and towels needed to complete the job. The wax included is 50ml, but with the way Swissvax products work this should still last you the best part of a year before it needs to be replaced.
The kit is here - http://www.detailer.ie/store/index.php/detailing-kits/onyx-discovery-kit.html