Are you serious? 8O
I mean...Asking such a personal question on a public forum? 8O
Comparing a marriage with a PC system upgrade and giving those decisions same weight? 8O
Do you have any friend or someone you can trust? 8O
Here there are different people with different mentality, age, IQ and education, but none of us knows you, her or your families.
Anyway, IMO upgrading your PC means:
1) You don't know what you want
2) You are running away from the problems
3) You don't have anything better to do
If I was you and I really loved her I would think:
1) If I really want to marry
2) If I am ready for marriage
3) If I can earn enough for both of us and perhaps a child or two
The rest is very complicated and depends of what kind of person is you, she and her father. If her father is a reasonable man go there and talk with him, he will understand you.