You need to aware that MYOB is not even rank top 10 in the list, it's famous 10 years ago, but not now. UBS software is going down to the drain since the company was bought over by Sage. Foreigner software doesn't suitable for local business. E.g. You will find a lot of redundant columns like First name, Last Name, Street, Address, Province, SSN. While local software using Name, Address 1, Address 2, Address 3, Postcode. Did you see the difference?

If you were asking who are the top player in the SME accounting software in Malaysia, I'd say Auto Count, SQL Account (Do not confuse SQL Account with SmartSQL), and QNE.
Since it's a startup, I guess your inventory still easy to be managed. I'd suggest you to take accounting module as a startup, manage your inventory in spreadsheet, 4 years later when you can see your inventory flow, then call them for upgrade. Implement an accounting module isn't an easy task, believe me, you won't have the time to key in your inventory. If you don't have the time, better don't key in at all, instead of key in half, otherwise the Cash Book reports will be in the mess in the end.