This is my first time in the forum and I must commend what a great forum this is!

I need some advice on the following matters and any tips given is highly appreciated!
1) CPF: I have checked out the website and there isn't much info provided to EP holders. I know that non-Singaporeans/PR are exempted from contributing to the CPF. I'm a bit confused just by looking at the rates but what is the statutory rate for employee and employer contribution to CPF (assuming upon obtaining PR)?
2) Is there a 'downside' to contributing to CPF? I hear ppl say and make it sound like it's a 'bad' thing once you become a PR. I suppose the only downside which I can think of is you're unable to withdraw the sum in the account if you choose not to stay in Singapore anymore?
3) (Related to no. 1) In my offer letter, I've been offered a basic salary and an additional amount of S$585 which is separately shown on the letter. There is a clause that says that the additional amount of $585 does not constitute a CPF contribution and is in no way related to CPF. Does anyone (especially those on EP) have any idea why they separate this amount, more so if they say that it's not a CPF, shouldn't it be lumped together with the basic salary? The reason why I'm asking is because I was informed by a friend (currently working in SG) that the $585 is the employer CPF contribution and that is the max to be given by the employer to us, regardless of how much you are currently earning. There is also a clause to state that in the event I am required by law to contribute to CPF, the employer has the discretion to cease paying me this $585. The only thing that I can think of which would make me contribute to CPF is if I obtain my PR, right? Shouldn't I, then be made to contribute to CPF? I also read somewhere in this forum that she/he is wondering if he/she can request their employer to continue paying them the CPF sum to them on top of their salary, as opposed to their CPF account. Is that even possible? I'm confused

3) Accomodation: My office will be in Raffles Quay and I wish to stay nearby. However, after searching about on the internet, the rental rates are extremely expensive. I have no idea where some of these places are. But I'm planning to spend $1k on rental (which i hope would also include utilities) and transportation (MRT). I don't think the latter would take up much of this budget? Correct me if I'm wrong. At best, I would like a studio apartment of my own (with air-con) and walking distance to MRT. All suggestions are welcomed!
I apologise for the long post but I'm due to start work in December 2006, hence I'm sort of panicking! Hehe. Thanks in advance!