NL25 - SPR in action?

[Notfunny1]

Sorry for the bump, but I am in the process of reading the book, and wanted to talk through some things related to SPR.
I think that I have always thought in terms of how much of my stack or how much money I am willing to commit to the pot.

For instance, If I am playing NL25 with a $25 dollar stack and the big blind calls my raise to $1 with a $20 dollar stack behind, then lets say I hit top pair on a dry board. At this point, I am making a decision based on my opponent as to how much I'm putting in on this hand lets say $8 vs. a reasonably tight player and $15 vs. a loosey. If the money gets past that point somehow without me improving, then I am most likely going to fold.

Now with SPR and REM and all that I'm doing basically the same thing, except on the flop I can see that the SPR is actually 10, which is too high for me to commit, so I have an artificial SPR in my mind as to how much I'm committed for... (4 for the tighty and 7.5 for the loosey)
Does this make sense? If this is covered later in the book where I haven't read to yet, I apologize.