Hi Dougpn,
In terms on comparing energy suppliers, unfortunately you are at a bit of a disadvantage in that you have no history as it were. All accurate energy comparisons based upon a consumer's known usage - this being your first property will make this difficult.
In general terms if you have the capability, I would strongly recommend you look at the on-line offerings supplier's have, due to the huge cost savings involved for your supplier you will see larger savings when compared to non-online tarrifs.
If you fancy taking a potentiual risk there are two new providers in the market, Ovu and First Utility. They have some good price structures each with their own pro's and con's. The risk is is that as with other new comers to the market they may quickly fizzle out.
On the other hand if you prefer protntially greater stability you may want to trry one of the "Big Six" I notice that E.on has recently introduced a new Online Plan - so it'd be worth a look.
As a first-timer some words of wisdom:
1 - never leave anything to anyone else, take your ownr eadings and personally provide them to your suppler.
2 - check every bill make sure the meter readings are accurate, evne if it means you paying more this time around.
3 - check the meter serial number of your meter against the one recorded on your bills.
4 - pay by MDD to increase your savings but keep an eye on your consumption and make sure it's sufficient to meet your summer, winter, spring and autumn usuage. Better to pay more and get a refund in spring than underpay and struggling to pay the arrears.