I looked around and researched to find out which chips are the best in general and the consensus seems to be that the Marvell 88SA8052 are considered to be the best for these kind of converters. I stumbled upon the Delock Converter SATA > IDE which has the Marvell 88SA8052.
They are more expensive than the chinese stuff on ebay, mine cost 25 euro with shipping. But it has a jumper for Master/slave selection and more interestingly it has a HDD Led header which shows the HDD activity(none of the cheap ebay ones seem to have that). So I bought this one and attached a standard HDD LED I had left over from an old ATX case.
http://www.delock.de/produkte/S_61702/m ... anguage=en
For the disk I bought the SSHD Seagate Firecuda compute 2.5 inch 2TB with 8GB NAND flash buffer and this seems to work perfectly. This is a cheap way to get some SSD performance without buying a 2TB SSD

https://www.seagate.com/in/en/internal- ... /firecuda/
What is interesting is that after setting it up with Hexen and XBpartitioner the boot times seems to become lower and lower.
So at first it took about 18 seconds and it has settled down to about 10-11 seconds now. I think this is due to the NAND buffer, but I am not sure. It is interesting that during boot up the HDD led will activate after 3 seconds and is on full for about 5 seconds and seems to flash very fast after and will stop activity after booting has completed.
When using UnleashX as a dash it shows the Unleashx Splash screen after 5 seconds and takes another 5 seconds (with the HDD led on full) to fully boot.