Blackboys is good.
Griffyn at Fletching is excellent (although not cheap), biiig garden & decent bbq bit.
Snowdrop in lewes is excellent (and a freehouse with good selection of beer and grub), its only downside is the garden is paved.
Ram at firle has sadly gone downhill, i certainly wouldnt recommend eating there unless you like small portions. The middle farm cider shop is well worth a visit though.
Abergavenny arms at Rodmell (just off SDW, south of lewes) is good for food.... which you'll regret when you're facing itford hill.
Half moon at plumpton, much as I hate to recommend it.... is pretty nice when they have the garden BBQ fired up.
Some of the local brews are very love/hate (harveys, Im looking at you), hence why I tend to rave about the freehouses.