Which FPGA/CPLD dev-kit should I go for ?

Hi C1Ron,

To learn more Avalon interfaces, Quartus Platform Designer, NIOS II, etc.

You can go through the University Program tutorial link below.

https://www.altera.com/support/training/university/materials-tutorials.html

For Design Tools, IP and Design Examples, you can refer to the link below.

https://www.altera.com/documentation/design-tools-ip-and-design-examples.html

With the features mention above, I would suggest you to get DE10-Nano Kit from Terasic with price of $130.

http://www.terasic.com.tw/cgi-bin/page/archive.pl?language=english&categoryno=205&no=1046&partno=1