You don't need high current discharge rates. Most important thing is the "deep cycle" capability to be ok drained to 30% or lower and ok if recharged reasonably quickly - that and being able to do so over and over. Can't see anything in the specs to say it wouldn't be ok, as long as you can get a decent multi-stage charger that suits it.
I've bought these sorts of things in the past. Your link seems a decent battery for similar pricing.
http://www.ebay.com.au/itm/12V-50AH-GEL-DEEP-CYCLE-BATTERY-GOLF-BUGGY-CARAVAN-4WD-DUAL-SYSTEM-CBG12V50AH-/281203595209?hash=item41790a57c9