I've always had good experiences with Hartke gear, even got a good result from a Transporter 410 with my now-departed Ashdown ABM 500, and that was without PA support.
A few months ago, I was in Mansons in Exeter and spotted this secondhand PRO 1800 cabinet for £200. I dabble with ska/reggae, and decided that this would be a good addition to my rig. Bought.
Since then I've paired it with the Peavey 210 (it was cheap) to provide the mids/highs that the 18" can't do, and run the lot with the Peavey MK6 XP head at 2 ohms. Mega happy with my rig now, it will get scary loud and can't have cost more than £400 altogether.