Thank you for your advise 

Original plugs are already Iridium, need to change every 50k to 60k km

Other things no comment except for the oct, which is a good choice. Do MBOxCFE and some other preventive maintenance after collecting the vehicle like engine oil and gearbox oil change at a reputable shop. Do note that the gearbox oil change is very critical and requires a shop that knows what needs to be done, otherwise it can cause premature failure instead. Perhaps you can consider doing both at EA Autoworks since they are the ones that do the remap

I think up to 1.0 bar, or an increase from 138 BHP up to 150 BHP, 13x WHP, 205NM to a more linear 225NM, both depending on vehicle's health.

I'd set aside a budget of 2k to 3k to recondition the car. No offense, but many can't actually afford to maintain the car properly and therefore dispose it when they can't take it anymore or when it just gets to a really bad state. There are a few parts that would probably require a replacement soon:

1. Engine, Transmission and Cross member mounts - RM4xx to 5xx including labour, original protons
2. Front and Rear Dampers - RM5xx to 6xx including labour (They're usually good for 60k to 80k km for Proton). Maybe add the top mounts and bearing if needed
3. Rear Upper Arms/ "dog-bone" - check with shop about their condition and if there's a need to replace them. These two parts have a tendency to fail early. Expect it to reach over 7xx in total, or 5xx for the rear upper arms only including labour
4. Front lower arms -> Check with shop and get a quote
5. FEAD belt + tensioner -> 4xx including labour
6. Some others I can't think of right now. Perhaps check the last timing belt kit/waterpump change, fan motor's health, and the fan relays
7. Edit -> CVT Damper recall. Check with the service centre on whether it has been done or not

I guess you're probably gonna buy some aftermarket suspension parts at some point since you plan to put in some racing seats. Item 2 to 4 assumes that you're replacing with original Proton parts, which I would suggest doing at a reputable shop that does a lot of Protons (please refer to CFE/CVT group or Suprima owner's group).

There are a few in particular that are highly recommended when it comes to getting replacement proton original parts and labour like Zordaq Motorsport, Zainuddin Jasman (person) with shop, Tam Turbo Motorsports, Haruddin Hamid (person) with shop. I've only ever done some jobs at Zordaq Motorsport from the list and they're good as expected, just perhaps a bit disorganised. Feel free to buy the parts yourself and bring it to your trusted workshop if you have one
As for further improvements, I would suggest maybe getting some sound deadening done for reducing engine and road noise. I did mine at EA Autoworks and it makes driving the car a lot more comfortable, unless of course you're just into driving this car fast and for fun

Yes I finally decided to buy Suprima and will collect it this wednesday. I had test drive it before buying and I was impressed with the throttle response. It respond much better than my 2.0 Inspira

I bought a 2015 model @ RM33K (Car price alone is RM29K)