While i understand how attractive it is to get an IFA just to 'tell' you what to do, infact they can only really work out the sums for you, to help you choose and recommend alternative products.
How do you feel about working out the options for yourself. On a spreadsheet, its really not complicated. So, for example, you might work out how much you get overall, if you stay there for 1, 5, 10, 15, 20 and 25 years. Start with the same salary, then make some guesses about how your salary might rise, and add those options in too. Talk to someone to clarify what the 1% cap means, and any other conditions.
Generally, if you stay there a long time, the final salary option will be hard to beat. If you stay there only say one to three years, the defined contribution options which lets you take everything with you might be better. But i thought that and stayed another ten years.
If you do it this way, you will really understand the options and will be able to see what difference different options will make and plan accordingly. Hope it works out for you.