Jac, Watergarden and Kubu Bali (and also the Lotus down the road) are the priciest options in Candi. Watergarden is probably the nicest, though I havent stayed at Lotus (but several times at both WG and KB). The seaside places are fine, but generally you should keep in mind Candi is pretty run down; the last time I was there the last ATM machine was gone too, keep that in mind. The beach is gone, the road is really busy with truck traffic, and many shops/restaurants/hotels have failed. The place is pretty quiet (some would say dead) so you should be able to just go there and find something without booking ahead, especially end of October, which is the quiet season. Apologies to HC, I still think a week is a long time to be there, unless you have transport and intend to use it as a base for exploring east Bali (Ujung, Tirtaganga, Ahmed, White Sands Beach, Sidemen, Klungkung). Seaside places would be about 1/2 of what WG would charge for an aircon room.